The microarray-generated expression data of the ABCB7 gene were validated and confirmed in a subset of 21 MDS patients (7 patients with RARS, 8 patients with RA, 6 patients with RAEB) and 7 healthy controls using real-time quantitative PCR (Figure 2). This evidence concerns the gene ABCB7 and myelodysplastic syndrome with single lineage dysplasia.